[zerop]

One more point I observed while UI performance debugging earlier: Even though JS are cached by browsers, still loading them from disk (cache) to memory during page load is actually slow. Of course it also depends on machine capacities.

[NavinF]

Hmm I wonder if there's a way to debug that. On a fast 1G internet connection and fast NVMe disk, the only status message I see on slow web pages is "waiting for cache". Maybe this is a chrome bug

[jeffbee]

That is a Chrome UI quirk. It's actually waiting on some subsequent action that doesn't bother clearing the status message.